Cosmic space

In mathematics, particularly topology, a cosmic space is any topological space that is a continuous image of some separable metric space. Equivalently (for regular T₁ spaces but not in general), a space is cosmic if and only if it has a countable network; namely a countable collection of subsets of the space such that any open set is the union of a subcollection of these sets.

单词	Cosmic space
释义	Cosmic space 原声例句 VOA常速英语_美洲 So, I make these kind of constellation cosmic spaces as a way to kind of point people into interacting with something that they can recognize. 所以我制作了这些星座宇宙，希望吸引人们与他们可以认识的东西互动。英语百科 Cosmic space In mathematics, particularly topology, a cosmic space is any topological space that is a continuous image of some separable metric space. Equivalently (for regular T₁ spaces but not in general), a space is cosmic if and only if it has a countable network; namely a countable collection of subsets of the space such that any open set is the union of a subcollection of these sets.
随便看	Rhododendron laojunshanense的意思 Rhododendron lapponicum的意思 Rhododendron lasiostylum的意思 Rhododendron lateriflorum的意思 rhododendron lateritium planch的意思 Rhododendron latoucheae的意思 Rhododendron laudandum的意思 Rhododendron ledifolium的意思 Rhododendron leiboense的意思 rhododendron leiopodium hayata的意思 Rhododendron leishanicum的意思 Rhododendron lepidostylum的意思 Rhododendron lepidotum的意思 Rhododendron leptopeplum的意思 Rhododendron leptosanthum的意思 Rhododendron leptothrium的意思 Rhododendron leucaspis的意思 Rhododendron levinei的意思 rhododendronlike的意思 Rhododendron liliiflorum的意思 Rhododendron lindleyi的意思 Rhododendron linearicupulare的意思 Rhododendron linearilobum的意思 Rhododendron litangense的意思 Rhododendron litchiifolium的意思